Method for using thermally stable esters in a lubricating oil for a refrigerating machine

An ester compound having thermal stability in the presence of a metal characterized in that the ester compound is formed between a dihydric to nonahydric hindered alcohol having 5-15 carbon atoms and a saturated aliphatic monocarboxylic acid having 3-20 carbon atoms or a derivative thereof; that the...

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Bibliographic Details
Main Authors SAKAI AKIMITSU, HAGIHARA TOSHIYA
Format Patent
LanguageEnglish
Published 08.05.2001
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
ADHESIVES
CHEMISTRY
DYES
FUELS
LUBRICANTS
LUBRICATING COMPOSITIONS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC CHEMISTRY
PAINTS
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
POLISHES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Summary:An ester compound having thermal stability in the presence of a metal characterized in that the ester compound is formed between a dihydric to nonahydric hindered alcohol having 5-15 carbon atoms and a saturated aliphatic monocarboxylic acid having 3-20 carbon atoms or a derivative thereof; that the ratio of a branched carboxylic acid or a derivative thereof to the entire carboxylic acids or derivatives thereof is not less than 50 mol %; that the hydroxyl value of the ester compound is not more than 30 mg KOH/g; and that the acid value after a sealed tube test is not more than 10 mg KOH/g; and a lubricating oil composition comprising the ester compound in an amount of not less than 50% by weight. The present invention provides an ester compound having outstandingly good thermal stability in the presence of a metal and a lubricating oil composition and a working fluid composition for a refrigerating machine comprising the ester compound as the main component.
Bibliography:Application Number: US19970863049